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1

Introduction

Before using the motor

Only qualified personnel of electrical and mechanical engineering should work with 

the product. Use the product correctly after thoroughly reading the section "Safety 

precautions." In addition, be sure to observe the contents described in warning, 

caution, and note in this manual.

The product described in this manual has been designed and manufactured to be 

incorporated in general industrial equipment.

Do not use for any other purpose. Oriental Motor Co., Ltd. is not responsible for any 

damage caused through failure to observe this warning.

Related operating manuals

Operating manuals for this product are listed below.

Operating manuals are not included with the product. Download from Oriental 

Motor Website Download Page or contact your nearest Oriental Motor sales office.

Operating manual name

Motor

BLM

 Motor Cable Type  OPERATING MANUAL (this document)

Driver

BMU

 Series  OPERATING MANUAL

For other descriptions, refer to the operating manual of the driver.

Safety precautions

The precautions described below are intended to prevent danger or injury to the 

user and other personnel through safe, correct use of the product. Please read and 

understand these precautions thoroughly before using the product.

WARNING

Handling the product without observing the 

instructions that accompany a “WARNING” symbol 

may result in serious injury or death.

CAUTION

Handling the product without observing the 

instructions that accompany a “CAUTION” symbol may 

result in injury or property damage.

Note

The items under this heading contain important handling 

instructions that the user should observe to ensure safe use 

of the product.

Description 

of graphic 

symbols

 :

Indicates "prohibited" actions that must not be performed.

 :

Indicates "compulsory" actions that must be performed.

WARNING

 

Do not use the product in explosive or corrosive environments, in the 

presence of flammable gases, in places subjected to splashing water, or near 

combustibles. Doing so may result in fire, electric shock or injury.

 

Do not transport, install the product, perform connections or inspections 

when the power is on. Always turn the power off before carrying out these 

operations. Failure to do so may result in electric shock or equipment damage.

 

Do not use a motor in a vertical application. If the driver’s protection function is 

activated, the motor will stop and the moving part of the equipment will drop, 

thereby causing injury or equipment damage.

 

Do not machine or modify the motor cable or connection cable. Doing so may 

result in fire, electric shock or damage to equipment.

 

Do not forcibly bend, pull or pinch the cables. Doing so may result in fire, 

electric shock or damage to equipment.

 

Do not touch the motor or driver when conducting insulation resistance 

measurement or dielectric strength test. Accidental contact may result in 

electric shock.

 

Do not disassemble or modify the motor (gearhead). Doing so may result in 

electric shock, injury or equipment damage. Should you require inspection or 

repair of internal parts, please contact the Oriental Motor branch or sales office 

from which you purchased the product.

 

Only qualified and educated personnel should be allowed to perform 

installation, connection, operation and inspection/troubleshooting of the 

product. Handling by unqualified and uneducated personnel may result in fire, 

electric shock, injury or equipment damage.

 

The motor and driver are Class 

I

 equipment. When installing the motor and 

driver, connect their Protective Earth Terminals. Failure to do so may result in 

electric shock.

 

Use a motor (gearhead) and driver only in the specified combination. An 

incorrect combination may cause in fire, electric shock or equipment damage.

 

Always turn off the power before performing maintenance/inspection. Failure 

to do so may result in electric shock.

HM-5205-3

O P E R A T I N G   M A N U A L

Thank you for purchasing an Oriental Motor product.

This Operating Manual describes product handling procedures and safety precautions.

 

Please read it thoroughly to ensure safe operation.

 

Always keep the manual where it is readily available.

Brushless Motor

BLM

 Motor  Cable Type

  

CAUTION

 

Do not use the motor (gearhead) beyond the specifications. Doing so may 

result in fire, electric shock, injury or damage to equipment.

 

Do not touch the motor (gearhead) while operating or immediately after 

stopping. The surface of the motor (gearhead) is hot and it may cause a skin 

burn(s).

 

Do not leave anything around the motor and driver that would obstruct 

ventilation. Doing so may result in damage to equipment.

 

Do not carry the product by holding the motor (gearhead) output shaft or any of the 

cables. Doing so may result in injury.

 

Do not touch the motor output shaft (tip or pinion) with bare hands. Doing so 

may result in injury.

 

When assembling the motor (pinion shaft) with the gearhead, exercise caution 

not to pinch your fingers or other parts of your body between the motor and 

gearhead. Injury may result.

 

When installing the motor (gearhead) in the equipment, exercise caution not 

to pinch your fingers or other parts of your body between the equipment and 

motor or gearhead. Injury may result.

 

Do not touch the rotating part (output shaft) when operating the motor. Doing 

so may result in injury.

 

Securely install the motor (gearhead) to their respective mounting plates. 

Inappropriate installation may cause the motor (gearhead) to detach and fall, 

resulting in injury or equipment damage.

 

Provide a cover on the rotating part (output shaft) of the motor (gearhead). 

Failure to do so may result in injury.

 

Securely install the load on the motor (gearhead) output shaft. Inappropriate 

installation may result in injury.

 

Be sure to ground the motor and driver to prevent them from being damaged by 

static electricity. Failure to do so may result in fire or damage to equipment.

 

The motor surface temperature may exceed 70 °C (158 °F) 

even under normal operating conditions. If the operator is 

allowed to approach a running motor, attach a warning label 

as shown in the figure in a conspicuous position. Failure to do 

so may result in skin burn(s).

Warning label

 

Dispose the product correctly in accordance with laws and regulations, or 

instructions of local governments.

Precautions for use

Be sure to match the motor output power with the driver output power.

 

z

Connecting the motor and driver

Use an accessory connection cable (sold separately) when extending the wiring 

distance between the motor and the driver.

 

z

Grease measures

On rare occasions, grease may ooze out from the gearhead. If there is concern over 

possible environmental damage resulting from the leakage of grease, check for 

grease stains during regular inspections. Alternatively, install an oil pan or other 

device to prevent leakage from causing further damage. Oil leakage may lead to 

problems in the customer’s equipment or products.

 

z

Caution when using under low temperature environment

When an ambient temperature is low, since the load torque may increase by the oil 

seal or viscosity increment of grease used in the gearhead, the output torque may 

decrease or an overload alarm may generate. However, as time passes, the oil seal or 

grease is warmed up, and the motor can be driven without generating an overload 

alarm.

 

z

Do not conduct the insulation resistance measurement or dielectric  
strength test with the motor and driver connected

Conducting the insulation resistance measurement or dielectric strength test with 

the motor and driver connected may result in damage to the product.

 

z

Rotation direction of gearhead output shaft

In the case of the combination type-parallel shaft gearhead, the rotation direction of 

the gearhead output shaft may differ from that of the motor output shaft depending 

on the gear ratio of the gearhead.

Gear ratio

Rotation direction of gearhead output shaft

5

10

15

20

200

Same as the motor output shaft

30

50

100

Opposite to the motor output shaft

 

Same as the motor output shaft when the gear ratio is 100:1 for the 200 W and  

300 W types

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